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Ccircuitrockscircuitrocks.hashnode.dev5d ago · 2 min read

Flip-Dot Display Turns Fluid Physics Into Sound on a Pi Pico 2 W

Most fluid simulations on LED matrices look great and say nothing. The whole effect is visual, and the moment you look away it goes silent. Maker Tim Alex Jacobs, who goes by Mitxela, wanted the oppos

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Ccircuitrockscircuitrocks.hashnode.devSep 9 · 3 min read

A Raspberry Pi 5 E Ink Frame That Paints the Birds It Hears

A thin lavalier microphone pokes out from under the eaves of a house in Bergen, Norway, its cable running back through a closed window. Somewhere inside, a picture frame on the wall quietly redraws it

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Ccircuitrockscircuitrocks.hashnode.devAug 31 · 3 min read

This ESP32 CHIP-8 Computer Runs on a Flame and a Stirling Engine

Power is the quiet constraint on every portable build. You size a battery, budget your current draw, and then quietly decide what the project will never do. PicketCode went the other way and removed t

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Ccircuitrockscircuitrocks.hashnode.devAug 30 · 3 min read

Wireless ESP32 Bike Brakes: ABS From Car Door Lock Actuators

Cutting the cable on a bicycle brake sounds like a bad idea until you see what the ESP32 does with the freedom. Berm Peak strapped a radio link between the levers and the calipers of a fat-tire bike,

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Ccircuitrockscircuitrocks.hashnode.devAug 29 · 3 min read

An Arduino Nano ESP32 Robot Flips All 666 Pixels of This Display

Mechanical displays are having a moment. Flip-disc panels, split-flaps, and solenoid-driven pixel walls keep turning up at maker fairs, mostly because a display you can hear beats one that only glows.

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Ccircuitrockscircuitrocks.hashnode.devAug 28 · 3 min read

A XIAO ESP32-S3 Clock Hiding Inside a Fake Linksys WRT Router

Desk clocks built out of dead consumer hardware have quietly turned into their own genre. Makers have packed displays into old cable modems, rotary phones, and rack switches, and the reason is always

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Ccircuitrockscircuitrocks.hashnode.devAug 3 · 2 min read

Build a Working Apollo DSKY Replica with Raspberry Pi and Arduino

Every embedded systems student learns the same lesson eventually: constraints breed cleverness. The Apollo Guidance Computer that flew astronauts to the Moon ran on roughly 2 KB of erasable memory and

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Ccircuitrockscircuitrocks.hashnode.devAug 2 · 2 min read

ESP-KVM Turns an ESP32-P4 Into a $45 Open-Source IP KVM

A locked-up PC with a black screen usually means walking over to wherever the machine lives, monitor and keyboard in hand. ESP-KVM deletes that walk. It runs on Espressif's ESP32-P4 and hands you full

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Ccircuitrockscircuitrocks.hashnode.devJul 31 · 2 min read

Open Sauce 2026: Maker Builds You Can Recreate This Weekend

Walking the Open Sauce 2026 show floor, Hackster community lead Joel Bados landed on seven takeaways. The one worth acting on this weekend is simple: almost every crowd-stopping build started as a per

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Ccircuitrockscircuitrocks.hashnode.devJul 27 · 2 min read

Build a Palm-Sized POV TV with a Raspberry Pi Pico

Clear a corner of your workbench and gather a handful of parts, because this palm-sized television is an afternoon build, not a semester project. Here is the shopping list for a Scanwheel of your own:

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Trending tags this week

Flip-Dot Display Turns Fluid Physics Into Sound on a Pi Pico 2 W

A Raspberry Pi 5 E Ink Frame That Paints the Birds It Hears

This ESP32 CHIP-8 Computer Runs on a Flame and a Stirling Engine

Wireless ESP32 Bike Brakes: ABS From Car Door Lock Actuators

An Arduino Nano ESP32 Robot Flips All 666 Pixels of This Display

A XIAO ESP32-S3 Clock Hiding Inside a Fake Linksys WRT Router

Build a Working Apollo DSKY Replica with Raspberry Pi and Arduino

ESP-KVM Turns an ESP32-P4 Into a $45 Open-Source IP KVM

Open Sauce 2026: Maker Builds You Can Recreate This Weekend

Build a Palm-Sized POV TV with a Raspberry Pi Pico